body {
  position: relative;
}

/* page-header from bootstrap 3 */
.page-header {
  padding-bottom: 9px;
  margin: 40px 0 20px;
  border-bottom: 1px solid #eee;
}

/* navigation areas */

nav .nav > li > a {
  display: block;
  padding: 4px 20px;
  font-size: 14px;
  font-weight: 500;
  color: #767676;
}
nav .nav > li > a:hover,
nav .nav > li > a:focus {
  padding-left: 19px;
  text-decoration: none;
  color: #0056b3;
  background-color: transparent;
  border-left: 1px solid #0056b3;
}
nav .nav-link.active,
nav .nav-link.active:hover,
nav .nav-link.active:focus {
  padding-left: 18px;
  font-weight: bold;
  color: #0056b3;
  background-color: transparent;
  border-left: 2px solid #0056b3;
}

nav .nav .nav > li > a {
  padding-top: 1px;
  padding-bottom: 1px;
  padding-left: 30px;
  font-size: 13px;
  font-weight: normal;
}
nav .nav .nav > li > a:hover,
nav .nav .nav > li > a:focus {
  padding-left: 29px;
}
nav .nav .nav > li > .active,
nav .nav .nav > li > .active:hover,
nav .nav .nav > li > .active:focus {
  padding-left: 28px;
  font-weight: 500;
}

nav .nav-link.active + ul {
  display: block;
}

nav[data-toggle="toc"] {
  top: 42px;
}

/* small screens */
@media (max-width: 768px) {
  /* override stickyness so that the navigation does not follow scrolling */
  nav[data-toggle="toc"] {
    margin-bottom: 42px;
    position: static;
  }

  /* PICK ONE */
  /* don't expand nested items, which pushes down the rest of the page when navigating */
  nav[data-toggle="toc"] .nav .active .nav {
    display: none;
  }
  /* alternatively, if you *do* want the second-level navigation to be shown (as seen on this page on mobile), use this */
  /*
  nav[data-toggle='toc'] .nav .nav {
    display: block;
  }
  */
}